Yes. 5xx codes are server errors: The server failed to fulfil a valid-looking request.

5xx · Server error

HTTP 508 Loop Detected

The server found an infinite loop while processing the request (WebDAV).

Example response

HTTP

HTTP/1.1 508 Loop Detected
Content-Type: application/json; charset=utf-8

{ "error": "Loop Detected" }

Look up the headers shown here in the HTTP headers reference.

What does HTTP 508 mean?: Loop Detected. The server found an infinite loop while processing the request (WebDAV).
Is 508 an error?: Yes. 5xx codes are server errors: The server failed to fulfil a valid-looking request.